Unit multiple system of control for electric railways.



Patented Jan. 30, I900.

r. c. ESMOND. UNIT MULTIPLE SYSTEM OF CONTROL FOB ELECTRIC BAILWAYS.

(Application filed Sept. 97, 1898,)

(No Model.)

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UNITED STATES PATENT OFFICE.

FREDERICK C. ESMOND, OF NET/V YORK, N. Y., ASSIGNOR TO THE ESMOND ILECTRIO TRACTION AND SIGNALLING COMPANY, OF WVEST VIRGINIA.

UNIT MULTIPLE SYSTEM OF CONTROL FOR ELECTRIC RAILWAYS.

SPECIFICATION forming part of Letters Patent No. 642,216, dated January 30, 1900.

Application filed September 27, 1898. Serial No. 6 91,969. (No model.)

To all whom it may concern.-

Be it known that I, FREDERICK (J. EsMoNn, a citizen of the United States, residing at New York, (Brooklyn,) in the county of Kings and State of New York, have invented a certain new and useful Unit Multiple System for Electric Railways, of which the following is a specification.

My invention relates to unit multiple systems for electric railways-thatis, a system in which a train of cars can be controlled from any one car.

I will describe a system embodying my invention and then point out the novel features thereof in claims.

In the drawings, Figure 1 is a diagrammatic view of a way of wiring a car by which my system may be effected. Fig. 2 isa similar view showing the position of the controller-arm and the several switches when the motor of the car is controlled from another car.

Similar letters and numerals of reference refer to corresponding parts in both the figures.

A represents a supply-conductor extending the whole length of the line, B a trolley or other device for taking current therefrom, and G a conductor from said trolley to the arm D of a controller D. The controller is of the usual construction,with the exception that it has in addition two contact-plates D D, which are insulated apart. These plates are connected by conductors D D with conductors E F, and when the controller-arm is on these plates current will be supplied to both the conductors E and F. The full-speed notch of the conductor is connected with a switch-arm G, which is adapted to engage with contact-points 1 and 2, which are respectively in electrical connection with the conductors E and F. This form of switch constitutes a reversing-switch, which by changing from one contact-point to the other will cause the current to flow in either direction through one of the elements of the motor.

The conductors E and F extend, preferably, through the car, so that when a train is made up the ends on adjacent cars may be easily coupled, and between these conductors one element (the field) H of the motor is placed.

The other element I is tapped into the field, preferably at its middle point, and has a connection with aground or return J. Aswitch J may be interposed between the field and ar- 5 5 mature, so that any motor that may become inoperative can be cut out of the circuit.

The manner of operating a train according to this system is as follows, assuming the cars shown in Figs. 1 and 2 to be coupled and also the conductors E and F, the controller-arm on the no-current notch of the controller and the switch-arm G in a neutral position. When the controller-arm in Fig. 1 is moved over the sections, current will be snpplied to either conductor E or F, according to the position of the arm G relatively to the points 1 and 2. In Fig. 1 the arm is on contact-point 2, so that current will be supplied to conductor F to all the fields of the train through one-half of each field to the armature and then to ground in each car. If the arm G were on the point 1, the current would then pass into conductor E to all the fields and then through the other half of the field in an opposite direction, thereby causing the m0- tor to turn in the opposite direction. When the current is to be shut off from the motor,- the controller-arm D is moved to sections D D so that the current will be sent to both conductors E F at the same time, and consequently through the field in opposite directions. The purpose of this is to destroy all the magnetism in the field and hold the armature, and further to prevent any sparking when the current is put on and off the motor.

What I claim as my invention is- 1. The combination of a pair of conductors extending through a car, a motor carried by said car and having its field between said con- 0 ductors and its armature tapped into the mid dle of the field, a controller connected with an electric-current supply, a reversing-switch connected with said controller and conductors whereby current may be sent through one- 5 half the field in either direction substantially as described.

2. The combination of a pair of conductors extending through a car, a motor carried by said car and having one of its elements between said conductors and its other element connected to said first element, a controller having a connection with an electrical supply and with said conductors, through a reversing switch, and a separate connection with each of said conductors from adjacent points whereby 5 when the arm of the controller engages said points, current will be passed through the element between the conductors in both directions substantially as described.

3. The combination of a pair of conductors extending through a car, a motor carried by said car and having one of its elements between saidconductors, a controller carried by said car having two adjacent points which have separate connections with said conductors, whereby when the arm of the controller engages said points current Will be sent through the element between the conductors in opposite directions.

4. In a unit multiple system of electrical control, the combination of a number of cars forming a train, a pair of conductors extending through said train, a multiplicity of motors carried by said train and having the field of each motor between said conductors and the armature tapped into the middle of the field, a controller or controllers carried by said train and having connection with an electric-current supply, a reversing switch or switches connected with said controller or controllers and with said conductors.

5. The combination. of a pair of conductors extending through a car, a motor carried by said car and having one of its elements between said conductors and its other element tapped into the middle of the first element, a controller connected with an electric-current supply, a reversing-switch connected with said controller, and conductors, whereby current may be sent through one-half of one of the elements in either direction.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FREDERICK 0. ES MON I).

lVitnesses:

ANTHONY GREF, Gno. E. Onusn.

f I l g It is hereby certified that the name of the assignee in Letters Patent N 0. 642,216,

granted January 30,1900, upon the application of Frederick O. Esmond, of New York, N. Y., for an improvement in Unit Multiple Systems of Control for Electric Railways Was erroneously Written and printed Esmond Electric Traction and Signalling Company, whereas said name should have been Written and printed Esmond Electric Traction and Signal Company; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Oflice.

Signed, countersigned, and sealed this 6th day of February, A. D., 1900.

THOS. RYAN,

[SEAL] First Assistant Secretary of the Interior.

Oountersigned O. H. DUELL,

Commissioner of Patents.

Ccrreetien in Letters Pat nt Fi e.

ltt is hereby certified that the name of the assignce in Letters Patent No. (38,216,

granted January 30,1900, upon the application of Frederick G. Esmond, of New York, N.

Railways was erroneously Written and printed Esniond Electric Traction and Sig Y., for an improvement in Unit Multiple Systems of Control for Electric nalling Company, Whereas said name should have been Written and printed Esmoml Electric Traction and Signal Company; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Offiee.

tiligned, conntersigned, and sealed this 6th day of February, A. D., 1900.

THOS. RYAN, First Assistant Secretary of the Exterior. [Jountersigned U. H. DUELL,

Coimm'ssz'oner 0f Pefenzs.

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